Oil saver



Jan. 17, 1939. J. R. DAVIDSON OIL SAVER Filed Oct. 28, 1938 2Sheets-Sheet 1 Attorneys Jan. 17, 1939. J. R. DAVIDSON 2,144,403

OIL sAvER Filed 001;. 28, 1938 2 Sheets-Sheet 2 In venior Patented Jan.17, 19 39 UNITED STATES PATENT OFFICE on. seven James a. Davidson, mama,La. Application October as, 1938, Serlal No. 237.581.

Llalms- 5 wells; and the invention together with its objects andadvantages will be best understood from a; study of the followingdescription taken in connection with the accompanying drawings where-.

Figure l is a view partly in section and partly in elevation showing theimproved oil saver,

Figure 2 is an elevational view of one of the sections of the splithousing forming part of the invention,

Figure 3 is a view of a section of the split housing and viewing thesame from the side opposite to that shown in Figure 2,

Figure 4 is an edge. elevational view of a 01- lower,

Figure 5 is a top plan view of the follower, Figure 6 is a top plan of apacking, and Figure 7 is a side elevational view of a bushing. Referringto the drawings by reference numerals it will be seen that in accordancewith the 25 present invention, the same, in the preferred embodimentthereof comprises a split casing, the complemental sections or halves ofwhich are indicated by the reference numeral 5. The sections 5 areprovided with bolt holes 6 to acc'om Q modate bolts 7 through the mediumof which the sections are secured together.

The sections 5 are suitably formed at their inner or meeting faces toprovide openings for the passageof the pull rope or drill line 8, and

5 arrangedwithin the openings d provided to ac commodate the pull ropeor drill line 85 are flanged bushings it as shown.

The bushingsiii are provided with apertured lateral ears ii toaccommodate pins i2 through the medium of which the bushings are securedwithin the openings 9.

The bushings iii are disposed, as shown, at the top and bottom of apacking chamber i3, and are preferably of bronze. Said bushings It willserve 45 to prevent the wire cable from coming into rubbing contact withthe casing of the oil saver thus preventing formation of sparks whichusually results from the rubbing contact of the wire cable d with thesteel body or casing of the oil 5 saver. Thus the bushings It are asafety feature as will 'be apparent.

The outer ends of the packing chamber It are closed through the mediumof plates M bolted to the casing as at E5 and provided with threaded 55bushings it for threadedly receiving screws i'i.

Screws i! on their outer ends are provided with suitable handles it asshown. The screws H are provided for advancing and retracting followersit that, have a sliding flt within the opposite ends of the chamber I3.

As clearly shown in Figures 1 and 4 the 'follow-' ers it are providedwith keyhole slots 20 to accommodate ball head-equipped shanks 2iprovided on the inner ends of the screws i'l whereby to provide a quickdetachable connection between the screws and the followers.

The followersis are provided with substantially V-shaped grooves 22 forreceiving therein substantially V-shaped ribs 23 on the outer ends ofpacking elements 2t formed of rubber or other suitable material.

The packing elements 26 are provided with vertical concave grooves orseats for engaging around the cable, rope or drill line 3.

Below the chamber it the sectionsof the casing are complementarilyformed to provide a slipchamber 25 in which are pivoted as at 2'! slips2B.

The slips 28 have free jaw ends 29 adapted to have biting engagementwith the rope socket, bars and swab on bottom end of wire line or cable8 in a manner to hold the socket, bars and swab, or tools, from passingdownward through'the oil saver and tubing in the event the wire line orcable should break while being run into oil saver. By thus holding therope the swab pulled thereby is held against dropping down into the welland consequently a fishing for the swab or pulling the tubing out of thewell to recover the swab is obviated.

The slips it are yieldably urged into a position for engagement with thetools e through the medi of coil springs 31 suitably provided within thechamber 26 and engag the slips 28 as shown. For limiting movement of theslips 2B in response to the springs 3| there are threaded upwardlythrough the bottom of the chamber 26 stop screws 32 as shown in Figural.

Also below the chamber 26 the casing is suitably threed as at 33 toattach to the well casing, tubing, pipe, or chamber containing the fluidwhich it is desired to pack ofi.

It is thought that a clear understanding of the construction, utility,operation and advantages of an oil saver embodying the features of thepresent invention will be had without a more detailed description.

Having thus described'the invention what is claimed as new is:-

1. An oil saver embodying a casing having a 55 iii ciprocating element,and also having arranged in said passage vertically spaced bushings forguiding said reciprocating element and retaining the same out of rubbingcontact with the casing; said casing also having an upper. packingchamber, elastic packing blocks slidably arranged within the chamber forengagement with the recipro- 'cating element, followers for the blocks,and operating screws for the followers, said operating screws havinginner ends provided with ball-head equipped shanks, and said followerblocks having in one vertical face thereof key hole slots for receivingsaid heads and cooperating therewith to provide quick detachableconnections between the screws and followers.

2. In an oil saver, a housing having a vertical passage therethrough forreceiving a reciprocating element and also having a transverse packingchamber, packing means arranged in said chamber and'accommodating thereciprocating element, said casing having beneath said chamber aslip-chamber and slips arranged in said chamber and having grippingfaces for engaging said reciprocating element and for holding saidelement and oil saver against relative movement.

3. An oil saver embodying a casing having a vertical passagetherethrough for receiving a reciprocating element, and also havingarranged in said passage vertically spaced bushings for guiding saidreciprocating elements and retaining I 7 2,144,408 vertical passagetherethrough for receiving a rebetween the screws and followers, saidcasing having beneath said packing chamber a slip chamber, spring-biasedslips pivoted within said chamber at opposite sides of said verticalpassage and having free ends to engage the reciprocating element.

4. An oil saver embodying a casing having a vertical passagetherethrough for receiving a reciprocating element, and also havingarranged in said passage vertically spaced bushings for guiding saidreciprocating elements and retaining the same out of rubbing contactwith the casing; said casing also having an upper packing chamber,elastic packing blocks slidably arranged within the chamber forengagement with the reciprocating element, followers for the blocks, and

operatingscrews for the followers, said operating screws having innerends provided with ballhead equipped shanks, and said follower blockshaving in one vertical face thereof key hole slots for receiving saidheads and cooperating therewith to provide quick detachable connectionsbetween the screws and followers, said casing having beneath saidpacking chamber a slip chamber, spring-biased slips pivoted within saidchamber at opposite sides of said vertical passage and having free endsto engage the reciprocating element, and stop screws for said slipsthreadedly engaged with the bottom wall of said slip chamber to threadinwardly of said chamber for limiting swinging movement of the slips inopposition to the springs associated therewith.

5'. In an oil saver a casing provided with an upper packing chamber anda lower slip chamber, packing means in the upper chamber, and slipspivoted within the slip chamber, the packing and slips beingrespectively arranged for engaging a reciprocating element; said casingbeing provided with a vertical passage therethrough for receiving areciprocating element.

JAIWES R. DAVIDSON.

